... tents, air domes, banners, truckcovers. Tensile membranes high frequency welding machine 1. Professional for welding tent, canvas, inflatable PVC, fabric, tarpaulin ... , accurate position and flexible action 3. Parameter:Model: WS-4000S / WS-5000S / WS-8000S / WS-10000S / WS-15000SD Power output: 4,000W, 5,000W, 8 ...